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EXPERIMENTAL INVESTIGATION OF HEAT FLUX FLUCTUATIONS ON THE REAR COVER OF A PLANETARY PROBE ENTRY-CONFIGURATION

Neeb, Dominik and Gülhan, Ali and Merrifield, J.A. and Walpot, L. and Molina, R. (2015) EXPERIMENTAL INVESTIGATION OF HEAT FLUX FLUCTUATIONS ON THE REAR COVER OF A PLANETARY PROBE ENTRY-CONFIGURATION. In: Proceedings of the 8th European Symposium on Aerothermodynamics for Space Vehicles (90439), pp. 1-12. 8th European Symposium on Aerothermodynamics for Space Vehicles, 02. - 06. March 2015, Lissabon, Portugal.

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Official URL: http://www.congrexprojects.com/Custom/15A01/Papers/Room%201.1/Wednesday/Measurement%20techniques%20IV/90439_Neeb.pdf

Abstract

To develop effective thermal protection systems for planetary probes to enter the planet’s atmosphere, it is important to be able to simulate the thermal loads with sufficient confidence. Although the convective thermal loads in the base region of blunt capsule configurations are orders of magnitude less compared to the frontshield values, the criticality in this region arise from the great uncertainties of the prediction. The challenge is to capture the influence of the highly complex flow field in the base area, both, in experiments as well as in simulations. This flow field enforces convective heat loads along the rear cover surfaces which are expected to be highly time-dependent. This paper describes the results of a wind tunnel test campaign focused on the experimental detection of heat flux fluctuations in the rear cover of a planetary probe. The ExoMars Entry, Descent and Landing Demonstrator Module (EDM) was chosen as reference configuration to enable comparison to previous experimental and numerical results. Tests were conducted at two different hypersonic inflow conditions, three different angle of attacks and different roll angles to enable a sensitivity study. Several measurement techniques, capable of capturing heat flux fluctuations in different frequency-domains, from low-, mid- to high-frequency content, were applied.

Item URL in elib:https://elib.dlr.de/96122/
Document Type:Conference or Workshop Item (Speech)
Title:EXPERIMENTAL INVESTIGATION OF HEAT FLUX FLUCTUATIONS ON THE REAR COVER OF A PLANETARY PROBE ENTRY-CONFIGURATION
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Neeb, DominikDominik.Neeb (at) dlr.deUNSPECIFIED
Gülhan, AliAli.Guelhan (at) dlr.deUNSPECIFIED
Merrifield, J.A.Fluid Gravity Engineering LtdUNSPECIFIED
Walpot, L.ESA/ESTECUNSPECIFIED
Molina, R.ESA - ESTECUNSPECIFIED
Date:22 April 2015
Journal or Publication Title:Proceedings of the 8th European Symposium on Aerothermodynamics for Space Vehicles
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 1-12
Editors:
EditorsEmail
UNSPECIFIEDESA
Series Name:Conference Proceedings online
Status:Published
Keywords:Planetary probe, heat flux, rear cover, Mars, entry, aerothermodynamics
Event Title:8th European Symposium on Aerothermodynamics for Space Vehicles
Event Location:Lissabon, Portugal
Event Type:international Conference
Event Dates:02. - 06. March 2015
Organizer:ESA
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Explorationstechnologie (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Über- und Hyperschalltechnologien
Deposited By: Neeb, Dominik
Deposited On:11 May 2015 16:23
Last Modified:11 May 2015 16:23

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